Bolt-lock



oooo J OOOO I WEN-II UNIT D Y STATES PATENT OFFICE.

EDWARD W. SPRAG-UE, on BUELLS LOWELL, orno.

BOLT-LOCK.

SPECIFICATION forming part of Letters Patent No. 283,725, dated August 21, 1883.

Application filed Dcceniber.2,188i3. (Nomodeh) v To aZZ whom it may concern.

Be it known that I, EDWARD W. SPRAGUE," a citizen of the United States, residing at Buells Lowell, in the county of \Vashington and State of Ohio, haveinvented certain new and useful Improvements in Bolt-Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of this invention, and shows a vertical section.

Fig. 2 is a cross-section taken through the broken line a: w in Fig. 1. Figs. 3, 4, and 5 are details showing the different parts in perspective views. Fig. 6 is a perspective view of the hollow punch used in tamping the wash ers.

'lhisinvention has relation to means for fastening bolts in masonry on land or under water; and it consists in the process and device hereinafter set forth, and particularly pointed out in the appended claims.

In the annexed drawings, the letter a designates a bolt having an enlargement, Z), at its toe and threaded at its other end, as indicated at c, to receive a nut. Lead rings or rings of other soft metal having an inner diameter suf ficient to allow them to pass easilyover the threaded end of the bolt and along the same tothe enlargement b are indicated at d. hen the bolt is to besecured in the masonry, a perforation, e, is made in the latter of sufficient diameter to admit the enlarged toe of the bolt. This perforation is made into but not through the wall or piece of masonry, its depth being such that when the bolt is driven homeits threaded end will project sufficiently for its purposes. The bolt, having been driven home, as stated, is secured in the wall by means of the lead rings. These are passed over the outer end of the bolt and along the same until but will always maintain its full bearing against the wall of the perforation, so that the bolt will be firmly and effectually secured.

Having described this invention, what I claim, and desire to secure by Letters Patent,

1. The process of securing bolts in masonry, consisting, first, in boring a perforation in the masonry of larger diameter than the body of the bolt; second, placing therein a bolt having an enlarged toe, and, third, packing the interval between the body of the bolt and the wall of the perforation with lead rings duly tamped, substantially as specified.

2. The combination, with a bolt having an enlarged toe, b, and threaded outer end, 0, of the lead packing-rings (Z, arranged 011 the body of the bolt, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

EDVV'ARD WV. SPR-AGUE.

\Vitnesses:

G. L. CHAMBERLIN, DUDLEY S. NYE. 

